package com._54programer.websocket;

import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;

import java.time.LocalDateTime;


/**
 * TextWebSocketFrame: 表示一个文本帧(frame)
 */
public class WebSocketServerHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {
        System.out.println("服务器收到消息: "+msg.text());
        ctx.channel().writeAndFlush(new TextWebSocketFrame("服务器时间： "+ LocalDateTime.now() + ", "+msg.text()));
    }

    /**
     * 连接时触发
     */
    @Override
    public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
        //id表示唯一的值， LongText是唯一的, ShortText不是唯一的
        System.out.println("handlerAdded 长id: "+ ctx.channel().id().asLongText());
        System.out.println("handlerAdded 短id: "+ ctx.channel().id().asShortText());
    }

    @Override
    public void handlerRemoved(ChannelHandlerContext ctx) throws Exception {
        System.out.println("handlerRemoved 长id: "+ ctx.channel().id().asLongText());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }
}
